Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier
and data switch
SA639
1
200mV
2
5.00mV
–376ns
200ns/
1
RUN
RSSI OUTPUT
t
= 0.79µs
r
RF INPUT
f = 110MHz
2
LEVEL = -28dBm
PULSE
MODULATED
@ 10kHz
t1 = –376.0ns
t2 = 412.0ns
∆t = 788.0ns
1/∆t = 1.269MHz
SR00038
Figure 9. SA639 RSSI Rise Time
1
200mV
2
5.00mV
–1.36us
500ns/
1
RUN
RSSI OUTPUT
t = 1.89µs
f
10%
2
RF INPUT
f = 110MHz
LEVEL = -28dBm
PULSE MODULATED @ 10kHz
t1 = –1.36.0µs
t2 = 440.0ns
∆t = 1.800µs
1/∆t = 555.6kHz
SR00039
Figure 10. SA639 RSSI Fall Time
13
1998 Feb 10